+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15290 (1991 TF1) Classification: Main-belt Asteroid          SPK-ID: 2015290 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1395343839636314 3.7472e-08   a 3.177579450618262 2.3969e-08 au q 2.734197859480748 1.2488e-07 au i 17.69081549376285 4.8143e-06 deg node 170.465318733035 1.4266e-05 deg peri 275.4620034237036 2.2684e-05 deg M 337.708117322959 1.7784e-05 deg tp 2459128.611259872513 (2020-Oct-06.11125987) 0.00010271 TDB period 2068.916933678503 5.66 2.3409e-05 6.409e-08 d yr n .174004085973585 1.9688e-09 deg/d Q 3.620961041755775 2.7313e-08 au   Orbit Determination Parameters    # obs. used (total)      1440      data-arc span      10619 days (29.07 yr)      first obs. used      1991-10-12      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47916      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:59:28   Additional Information  Earth MOID = 1.82079 au   Jupiter MOID = 1.76777 au   T_jup = 3.112  [ hide covariance matrix ] Orbital Elements at Epoch 2457107.5 (2015-Mar-26.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1357282600700584 3.7563e-08   q 2.747870151692782 1.2462e-07 au tp 2457062.403510280366 (2015-Feb-08.90351028) 0.00010032 TDB node 170.5267242004172 1.425e-05 deg peri 276.1346931873945 2.3037e-05 deg i 17.69023340013969 4.8134e-06 deg   Orbit Determination Parameters    # obs. used (total)      1440      data-arc span      10619 days (29.07 yr)      first obs. used      1991-10-12      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47916      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:59:28   Additional Information  Jupiter MOID = 1.76777 au   T_jup = 3.112  Orbit Covariance (6×6)   e q tp node peri i e 1.410951516607268E-15 -4.617588180602669E-15 -5.158801779887359E-13 2.733534352222813E-15 -8.412778645582693E-14 -4.182823442518915E-15 q -4.617588180602669E-15 1.552942873560066E-14 1.825578531672723E-12 -9.155825078737769E-15 3.021839893427526E-13 1.55689340378879E-14 tp -5.158801779887359E-13 1.825578531672723E-12 1.006492379507256E-8 -3.363242609748397E-12 1.840647092886711E-9 5.65559293199909E-12 node 2.733534352222813E-15 -9.155825078737769E-15 -3.363242609748397E-12 2.030743534515344E-10 -1.938105877995543E-10 1.207984248556432E-11 peri -8.412778645582693E-14 3.021839893427526E-13 1.840647092886711E-9 -1.938105877995543E-10 5.307220169782751E-10 -1.043754599490513E-11 i -4.182823442518915E-15 1.55689340378879E-14 5.65559293199909E-12 1.207984248556432E-11 -1.043754599490513E-11 2.316898242312467E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.1   n/a MPO381385   diameter diameter 13.309 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 14.33958 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] geometric albedo albedo 0.069   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15290 (1991 TF1)          Discovered 1991-Oct-12 by McNaught, R. H. at Siding Spring Reference: 20000621/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1991 TF1 = 1999 CU4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 08:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin